Seth buys last year's best-selling novel, in hardcover, for $13.30$⁢13.30. this is with a 30%30% discount from the original price. what was the original price of the novel?

The percent increase is 25%

This law is sometimes called the grouping property. as you can see, regardless of how the numbers are grouped, the answer is still 13. the associative law of multiplication is similar to the same law for addition. it says that no matter how you group numbers you are multiplying together, you will get the same answer.